Tonnage (Tons)
Tonnage, or tons of cooling, is a short hand method for describing the capacity of cooling equipment. One ton is equal to approximately 12 kBTU/hr.

1.5 (3)

2.0 (1)

2.5 (1)

3.0 (1)

3.5 (1)

4.0 (2)

5.0 (1)

Nominal SEER
SEER (Seasonal Energy Efficiency Ratio) is a measurement of cooling efficiency over a typical cooling season. It is useful for comparing energy efficiency of cooling systems. The higher the SEER, the more energy efficient the system. Actual SEER may differ from Nominal SEER depending on the products used in a particular system.

13 (9)

14 (1)

Efficiency (%)

80 (66)

92 (12)

95 (1)

96 (32)

97 (9)

Refrigerant Type

R-22 (2)

R-410A (8)

Vent Type
Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.

Chimney Vent (66)

Direct Vent (54)

Orientation
Orientation describes the direction that air will flow through a piece of equipment. (e.g. air will flow horizontally through a "Horizontal" unit heater.) Most equipment will only function properly if installed in the proper orientation.

Downflow (23)

Downflow/Horizontal (18)

High Airflow (5)

Upflow (2)

Upflow/Horizontal (85)

Fuel Type
To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.

Liquid Propane (3)

Natural Gas (126)

Natural Gas/Liquid Propane (1)

Modulating/Staging
Stages are unique speeds or levels that equipment can operate at. More stages allow for better fine-tuned control of output, which improves comfort and efficiency. Modulating equipment can operate across a range of levels, giving the highest level of fine-tuned control. Learn More